US20170167757A1 - Air Conditioning System for Use in Vehicle - Google Patents
Air Conditioning System for Use in Vehicle Download PDFInfo
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- US20170167757A1 US20170167757A1 US14/965,142 US201514965142A US2017167757A1 US 20170167757 A1 US20170167757 A1 US 20170167757A1 US 201514965142 A US201514965142 A US 201514965142A US 2017167757 A1 US2017167757 A1 US 2017167757A1
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- Prior art keywords
- evaporator
- refrigerant
- shut
- air conditioning
- conditioning system
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00378—Air-conditioning arrangements specially adapted for particular vehicles for tractor or load vehicle cabins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/323—Cooling devices using compression characterised by comprising auxiliary or multiple systems, e.g. plurality of evaporators, or by involving auxiliary cooling devices
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- F25B41/04—
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3236—Cooling devices information from a variable is obtained
- B60H2001/3239—Cooling devices information from a variable is obtained related to flow
- B60H2001/3241—Cooling devices information from a variable is obtained related to flow of air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3236—Cooling devices information from a variable is obtained
- B60H2001/3255—Cooling devices information from a variable is obtained related to temperature
- B60H2001/3261—Cooling devices information from a variable is obtained related to temperature of the air at an evaporating unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3269—Cooling devices output of a control signal
- B60H2001/328—Cooling devices output of a control signal related to an evaporating unit
- B60H2001/3283—Cooling devices output of a control signal related to an evaporating unit to control the refrigerant flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2519—On-off valves
Definitions
- the present invention generally relates to vehicle air conditioning systems, and more particularly, to over-the-road and off-road vehicle air conditioning systems that can prevent undesired collection of refrigerant in one or more evaporators.
- HVAC vehicle heating, ventilation, and air conditioning
- Such vehicle HVAC systems may include multiple evaporators, one for each compartment.
- a system may include a cab evaporator (e.g., an evaporator associated with the cab compartment to cool the cab compartment) and a sleeper evaporator (e.g., an evaporator associated with the sleeper compartment to cool the sleeper compartment).
- a sleeper evaporator e.g., an evaporator associated with the sleeper compartment to cool the sleeper compartment.
- Such systems may also include multiple compressors connected to different power sources so that the vehicle HVAC systems can be operated when the engine of the vehicle is on and when it is off.
- the systems may be operated to allow the compressed and condensed refrigerant to pass through one or more of the evaporators while restricting the condensed refrigerant from passing through other evaporator(s).
- the systems may be operated to restrict the refrigerant from passing through the sleeper evaporator to reduce waste of the compressed and condensed refrigerant on an unoccupied compartment.
- the systems may be operated to restrict the refrigerant from passing through the cab compartment.
- the non-operating evaporator or evaporators While restricting the refrigerant from passing through the non-operating evaporator or evaporators (e.g., the sleeper evaporator when cooling in the sleeper compartment is not desired or the cab evaporator where cooling in the cab compartment is not desired), conventional systems cannot prevent the collection or accumulation of the refrigerant in the non-operating evaporator(s), in particular at the lower pressure side of the non-operating evaporator(s).
- the collection or accumulation of the refrigerant in the non-operating evaporator(s) reduces the effective amount of the refrigerant that should be used to cool the compartment(s) in need of cooling, making it difficult to meet (in some circumstances, only partially meet) the cooling demand. Consequently, the cooling capacity and overall efficiency of the HVAC systems are reduced, and the operational costs are increased.
- Various aspects of the present invention provide air conditioning systems with enhanced cooling efficiency and capacity that provide conditioned air to multiple compartments and that prevent the undesired collection of refrigerant in non-operating evaporators.
- the present invention provides an air conditioning system for use in a vehicle having two or more compartments.
- the air conditioning system includes at least one compressor, a condenser disposed downstream of the at least one compressor, a plurality of evaporators disposed downstream of the condenser, a plurality of shut-off valves and refrigerant lines.
- the refrigerant lines fluidly connect the at least one compressor, the condenser, and the plurality of evaporators to form a refrigerant circuit for circulating the refrigerant.
- the plurality of evaporators includes a first evaporator and a second evaporator fluidly coupled to each other in parallel.
- the first evaporator is in thermal communication with a first compartment of the vehicle to cool the first compartment and the second evaporator is in thermal communication with a second compartment of the vehicle to cool the second compartment.
- the plurality of shut-off valves includes a first shut-off valve and a second shut-off valve. The first shut-off valve is installed at a refrigerant inlet of the first evaporator and the second shut-off valve is installed at a refrigerant outlet of the first evaporator.
- the first and second shut-off valves are controlled to prevent refrigerant from collecting in the first evaporator. In some embodiments, the first and second shut-off valves are controlled to prevent refrigerant from collecting in the first evaporator when airflow over or through the first evaporator is less than a first predetermined volume.
- the air conditioning system further includes a first sensor and a controller electrically coupled to the first sensor and the first and second shot-off valves.
- the first sensor is configured to perform one or more of the following: (i) measure temperature of the first evaporator and (ii) measure airflow passing over the first evaporator.
- the controller is configured to control the operation of the first and second shut-off valves in accordance with the measured temperature or the measured airflow or both.
- the controller is configured to automatically close the first and second shut-off valves when the measured temperature of the first evaporator is lower than a first predetermined temperature, or when the measured airflow passing over the first evaporator is less than a first predetermined volume, and to automatically open the first and second shut-off valves when the measured temperature of the first evaporator exceeds the first predetermined temperature, or when the measured airflow passing over the first evaporator is equal to or greater than the first predetermined volume.
- the method includes manually and selectively opening or closing the first and second shut-off valves in accordance with temperature of the first evaporator or airflow passing over the first evaporator.
- the present invention provides an air conditioning system for use in a vehicle having two or more compartments.
- the air conditioning system includes at least one compressor, a condenser disposed downstream of the at least one compressor, a plurality of evaporators disposed downstream of the condenser, a plurality of shut-off valves, refrigerant lines, a first sensor and a controller.
- the refrigerant lines fluidly connect the at least one compressor, the condenser, and the plurality of evaporators to form a refrigerant circuit for circulating the refrigerant.
- the plurality of evaporators includes a first evaporator and a second evaporator fluidly coupled to each other in parallel.
- the plurality of shut-off valves includes a first shut-off valve and a second shut-off valve.
- the first shut-off valve is installed at a refrigerant inlet of the first evaporator and the second shut-off valve is installed at a refrigerant outlet of the first evaporator.
- the first sensor is configured to perform one or more of the following: (i) measure temperature of the first evaporator and (ii) measure airflow passing over the first evaporator.
- the controller is electrically coupled to the first sensor and configured to control the operation of the first and second shut-off valves in accordance with the measured temperature or the measured airflow or both.
- the controller is configured to automatically close the first and second shut-off valves when the measured temperature of the first evaporator is lower than a first predetermined temperature, or when the measured airflow passing over the first evaporator is less than a first predetermined volume, and to automatically open the first and second shut-off valves when the measured temperature of the first evaporator exceeds the first predetermined temperature, or when the measured airflow passing over the first evaporator is equal to or greater than the first predetermined volume.
- the plurality of shut-off valves includes a third shut-off valve and a fourth shut-off valve.
- the third shut-off valve is installed at a refrigerant inlet of the second evaporator and the fourth shut-off valve is installed at a refrigerant outlet of the second evaporator to prevent refrigerant from collecting in the second evaporator.
- the third shut-off valve and the fourth shut-off valve are controlled to prevent refrigerant from collecting in the second evaporator when airflow over the second evaporator is less than a second predetermined volume.
- the system includes a second sensor configured to perform one or more of the following: (iii) measure temperature of the second evaporator and (iv) measure airflow passing over the second evaporator.
- the controller is electrically coupled to the second sensor and configured to control the operation of the third and fourth shut-off valves in accordance with the measured temperature and the measured airflow.
- the controller is configured to automatically close the third and fourth shut-off valves when the measured temperature of the second evaporator is lower than a second predetermined temperature, or when the measured airflow passing over the second evaporator is less than a second predetermined volume, and to automatically open the third and fourth shut-off valves when the measured temperature of the second evaporator exceeds the second predetermined temperature, or when the measured airflow passing over the second evaporator is equal to or greater than the second predetermined volume.
- FIG. 1 is a block diagram illustrating a first exemplary air conditioning system.
- FIG. 2 is a block diagram illustrating a second exemplary air conditioning system.
- FIG. 3 is a block diagram illustrating a third exemplary air conditioning system.
- FIG. 4 is a block diagram illustrating a fourth exemplary air conditioning system.
- FIG. 5 is a schematic diagram illustrating an implementation of an air conditioning system in a vehicle.
- FIG. 6 is a schematic diagram illustrating an alternative implementation of an air conditioning system in a vehicle.
- FIG. 7 is a schematic diagram illustrating another alternative implementation of an air conditioning system in a vehicle.
- Embodiments of the present invention are described in the context of air conditioning systems for use in vehicles, and in particular, in the context of air conditioning systems to cool different compartments or different spaces of an over-the-road or off-road vehicle.
- the vehicle can be a car, a van, a truck, a bus, a trailer, or other automobiles.
- an air conditioning system of the present invention includes at least one compressor, a condenser, a plurality of evaporators and refrigerant lines.
- the refrigerant lines fluidly connect the compressor, condenser and evaporators to form a refrigerant circuit.
- the air conditioning system of the present invention also includes a plurality of shut-off valves disposed at the refrigerant circuit to prevent undesired collection of refrigerant in one or more of the evaporators, and thus enhance the cooling effect or capacity of the HVAC systems.
- the air conditioning system of the present invention includes a controller electrically coupled to the shut-off valves to control the operation of the valves.
- the controller is electrically coupled to other components of the air conditioning system (e.g., a compressor or a condenser or both) to control operation of these components.
- FIG. 1 depicts an air conditioning system ( 100 ) including a first compressor ( 102 ), a second compressor ( 104 ), a condenser ( 106 ), a first evaporator ( 108 ), a second evaporator ( 110 ), a first shut-off valve ( 112 ) and a second shut-off valve ( 114 ).
- the first and second compressors, the condenser, the first and second evaporators, and the first and second valves are fluidly connected by refrigerant lines ( 104 - 1 , 104 - 2 , etc.) to form a refrigerant circuit ( 138 ).
- the first and second compressors ( 102 , 104 ) are fluidly connected to each other in parallel by refrigerant lines ( 140 - 5 , 140 - 6 ) and are configured for compressing a refrigerant.
- the first compressor ( 102 ) is configured to connect to an internal combustion engine of the vehicle and is driven through a belt and pulley system by the internal combustion engine when the internal combustion engine is running.
- the second compressor ( 104 ) is configured to operate when the internal combustion engine ( 134 ) of the vehicle is not running, for example, by connecting to an electrical power source ( 136 ) such as a battery.
- the air conditioning system of the present invention can be operated when the engine is on as well as when the engine is off.
- the first and second compressors ( 102 , 104 ) are belt-driven compressors, electrically-driven compressors, or any other suitable compressors.
- an air conditioning system of the present invention has one compressor.
- the air conditioning system ( 200 ) of the present invention has one compressor ( 202 ).
- the compressor ( 202 ) can be a compressor driven by the engine (e.g., the same as or similar to the first compressor 102 in FIG. 1 ) or driven by a battery or other power sources (e.g., the second compressor 104 in FIG. 1 ).
- the condenser ( 106 ) is disposed downstream of the first and second compressors ( 102 , 104 ) and fluidly connected to the first and second compressors ( 102 , 104 ) by a refrigerant line ( 140 - 1 ).
- the condenser ( 106 ) is configured to condense the refrigerant compressed by the first or second compressor or both.
- downstream refers to a position along a refrigerant line in the direction of the refrigerant flow.
- upstream refers to a position along a refrigerant line opposite to the direction of the refrigerant flow. For example, FIG.
- FIG. 1 illustrates the condenser ( 106 ) disposed downstream of the first and second compressors ( 102 , 104 ) and upstream of the evaporator ( 108 ), where the directions of the refrigerant flow are indicated by the arrows.
- the first and second evaporators ( 108 , 110 ) are disposed downstream of the condenser ( 106 ) and fluidly connected to the condenser ( 106 ) by a refrigerant line ( 140 - 2 ).
- the first and second evaporators ( 108 , 110 ) are fluidly coupled to each other in parallel via refrigerant lines ( 140 - 3 , 140 - 4 ) and configured to evaporate the condensed refrigerant.
- the first shut-off valve ( 112 ) is installed at the refrigerant inlet of the first evaporator ( 108 ), and the second shut-off valve ( 114 ) is installed at the refrigerant out of the first evaporator ( 108 ).
- refrigerant inlet refers to an inlet of a corresponding evaporator and a portion of a refrigerant line upstream of the corresponding evaporator.
- refrigerant outlet refers to an outlet of a corresponding evaporator and a portion of a refrigerant line downstream of the corresponding evaporator.
- refrigerant inlet of the first evaporator refers to the inlet of the first evaporator ( 108 ) and a portion of the refrigerant line ( 140 - 3 ) upstream of the first evaporator ( 108 ).
- Refrigerant outlet of the first evaporator ( 108 ) refers to the outlet of the first evaporator ( 108 ) and a portion of the refrigerant line ( 140 - 3 ) downstream of the first evaporator ( 108 ).
- the first evaporator ( 108 ) is in thermal communication with a first compartment and the second evaporator ( 110 ) is in thermal communication with a second compartment to cool the first and second compartments.
- the term “in thermal communication” refers to one or more of the following: (i) the respective evaporator is mounted within a corresponding compartment to exchange heat with that compartment or with the air in that compartment, and (ii) the respective evaporator is coupled with a device (e.g., heat exchanger or air blower) which introduces conditioned air into that compartment.
- the first evaporator ( 108 ) is mounted in the first compartment and the second evaporator ( 110 ) is mounted in the second compartment.
- the first compartment can be separated from the second compartment, for example, by a wall or other barrier such as a curtain.
- the first compartment and the second compartment are different areas within the same space.
- the first compartment is a cab compartment, a sleeper compartment, or any other compartment in a vehicle.
- FIG. 5 illustrates an implementation of the air conditioning system ( 100 ) in a vehicle ( 502 ).
- vehicle ( 502 ) has a cab compartment ( 504 ) where an operator or driver operates the vehicle and a sleeper compartment ( 506 ) where the operator or driver can rest.
- first evaporator ( 108 ) is in thermal communication with the cab compartment ( 504 )
- second evaporator ( 110 ) is in thermal communication with the sleeper compartment ( 506 ).
- first and second shut-off valves ( 112 , 114 ) are opened, either manually or automatically, so that the condensed refrigerant flows through both the first and second evaporators ( 108 , 110 ) and provides cooling to both the cab and sleeper compartments.
- the first and second shut-off valves ( 112 , 114 ) are closed.
- first and second shut-off valves ( 112 , 114 ) are installed at both the refrigerant inlet and outlet of the first evaporator ( 108 ), closing the first and second shut-off valves ( 112 , 114 ) prevents the refrigerant from entering the first evaporator ( 108 ) from both sides and thus prevents the refrigerant from collecting or accumulating in the first evaporator ( 108 ). As a result, the condensed refrigerant flows only through the second evaporator ( 110 ) and thus enhances the cooling effect of the second evaporator ( 110 ).
- FIG. 6 illustrates an alternative implementation of the air conditioning system ( 100 ) of the present invention in the vehicle ( 502 ), where the first evaporator ( 108 ) is in thermal communication with the sleeper compartment ( 506 ) and the second evaporator ( 110 ) is in thermal communication with the cab compartment ( 504 ).
- the first and second shut-off valves ( 112 , 114 ) are opened, either manually or automatically, so that the condensed refrigerant flows through both the first and second evaporators ( 108 , 110 ) and provides cooling to both cab and sleeper compartments.
- the first and second shut-off valves ( 112 , 114 ) are closed. Similar to the embodiment illustrated in FIG. 5 , closing the first and second shut-off valves ( 112 , 114 ) prevents the refrigerant from entering into the first evaporator ( 108 ) from both sides and thus prevents the refrigerant from collecting or accumulating in the first evaporator ( 108 ). As a result, the condensed refrigerant flows only through the second evaporator ( 110 ) and thus enhances the cooling effect of the second evaporator ( 110 ).
- the first and second shut-off valves are operated (e.g., opened or closed) manually, for example, by a driver of the vehicle who desires more cooling in a compartment/area or wants no cooling at all in the compartment/area.
- the first or second shut-off valve or both are operated automatically, for example, by a controller ( 132 ).
- operating the first and second shut-off valves depends on other parameters or operations of other components in the air conditioning system.
- the first and second shut-off valves are manually or automatically closed to prevent refrigerant from collecting in the first evaporator.
- the first predetermined volume can be preset or reset in accordance with the type of vehicle, compartments associated with the first evaporator, preference of the drivers/operators/passengers, ambient temperature or other parameters.
- the first predetermined volume is at most 75 Cubic Feet per Minute (CFM), indicating cooling is undesired in the compartment associated with the first evaporator.
- an air conditioning system of the present invention includes more than two shut-off valves.
- FIG. 3 illustrates an air conditioning system ( 300 ) having four shut-off valves
- FIG. 7 depicts an implementation of the air conditioning system ( 300 ) in the vehicle ( 502 ).
- the air conditioning system ( 300 ) includes a third shut-off valve ( 302 ) and a fourth shut-off valve ( 304 ).
- the third and fourth shut-off valves ( 302 , 304 ) are installed at the refrigerant inlet and outlet of the second evaporator ( 110 ).
- the third and fourth shut-off valves ( 302 , 304 ) can be opened/closed, manually or automatically. Similar to the first and second shut-off valves ( 112 , 114 ), closing the third and fourth shut-off valves ( 302 , 304 ) prevents the refrigerant from entering into the second evaporator ( 110 ) from both sides and thus prevents the refrigerant from collecting or accumulating in the second evaporator ( 110 ). As a result, the condensed refrigerant flows only through the first evaporator ( 108 ) and thus enhances the cooling effect of the second evaporator ( 108 ).
- operation of the third and fourth shut-off valves ( 302 , 304 ) can depend on other parameters or operations of other components in the air conditioning system.
- the first, second, third and fourth shut-off valves are selectively and independently controlled. For example, when airflow over the second evaporator is less than a second predetermined volume (e.g., indicating cooling is undesired in the compartment associated with the second evaporator), the third and fourth shut-off valves are manually or automatically closed to prevent refrigerant from collecting in the second evaporator.
- the second predetermined volume can be preset or reset in accordance with the type of vehicle, compartments associated with the second evaporator, desire of drivers/operators, or other parameters.
- the second predetermined volume can be the same as or different from the first predetermined volume.
- the second predetermined volume is at most 75 Cubic Feet per Minute (CFM), indicating cooling is undesired in the compartment associated with the second evaporator.
- CFM Cubic Feet per Minute
- the air conditioning system ( 100 ) of the present invention includes a first sensor ( 128 ) and a controller ( 132 ) electrically coupled to the first sensor ( 128 ).
- the control ( 132 ) is an intelligent power generation management controller described in U.S. Publication No. 2007/0131408 and U.S. Pat. Nos. 7,591,143 and 8,453,722, all of which are expressly incorporated by reference in their entirety, and in particular with reference to intelligent power generation management controllers.
- the first sensor ( 128 ) is configured to perform one or more of the following: (i) measure temperature of the first evaporator ( 108 ) and (ii) measure the airflow passing over the first evaporator ( 108 ).
- the controller ( 132 ) automatically closes or sends instruction to close the first and second shut-off valves ( 112 , 114 ).
- the controller ( 132 ) When the measured temperature exceeds the first predetermined temperature or when the measured airflow passing over the first evaporator is equal to or greater than the first predetermined volume, the controller ( 132 ) automatically opens or sends instruction to open the first and second shut-off valves ( 112 , 114 ).
- the controller ( 132 ) is electrically coupled to one or more other components in the air conditioning system.
- the controller ( 132 ) is electrically coupled to the first compressor ( 102 ) or the second compressor ( 104 ) or both to automatically control the operation of the compressors in accordance with ambient temperature, operation of the engine, the cooling demand of the compartments of the vehicle, or other parameters.
- the air conditioning system ( 100 ) of the present invention includes a plurality of control valves to selectively restrict or permit flow of the refrigerant to the compressors.
- FIG. 1 illustrates the air conditioning system ( 100 ) having a first flow control valve ( 129 ) and a second flow control valve ( 130 ).
- the first flow control valve ( 129 ) is disposed at the refrigerant line ( 104 - 5 ) upstream of the first compressor ( 102 ) and configured to selectively restrict or permit flow of the refrigerant to the first compressor ( 102 ).
- the second flow control valve ( 130 ) is disposed at the refrigerant line ( 104 - 6 ) upstream of the second compressor ( 104 ) and configured to selectively restrict or permit flow of the refrigerant to the second compressor ( 104 ). In some embodiments, the operation of the flow control valves is automatically controlled by the controller.
- the air conditioning system ( 100 ) of the present invention includes a plurality of metering devices to control flow of the refrigerant into the evaporators.
- FIG. 1 illustrates the air conditioning system ( 100 ) having a first metering device ( 116 ) and a second metering device ( 118 ).
- the first metering device ( 116 ) is disposed at the refrigerant line ( 104 - 3 ) between the first shut off valve ( 112 ) and the first evaporator ( 108 ) and configured for controlling flow rate of the refrigerant into the first evaporator ( 108 ).
- the second metering device ( 118 ) is disposed at the refrigerant line ( 104 - 4 ) upstream of the second evaporator ( 110 ) and configured for controlling flow rate of the refrigerant into the second evaporator ( 110 ).
- the first and the second metering devices are thermal expansion valves.
- the operation of the metering devices is automatically controlled by the controller.
- the air conditioning system ( 100 ) of the present invention includes a receiver/drier ( 120 ).
- the receiver/drier ( 120 ) is disposed at the refrigerant line ( 104 - 3 ) between the condenser ( 106 ) and the evaporators ( 108 , 110 ).
- the receiver/drier ( 120 ) is configured to temporarily store the refrigerant, absorb moisture from the refrigerant, or both.
- the air conditioning system ( 100 ) of the present invention includes a plurality of air blowers to enhance the performance of some components in the air conditioning system.
- FIG. 1 illustrates the air conditioning system ( 100 ) having a first air blower ( 122 ), a second air blower ( 124 ) and a third air blower ( 126 ).
- the first air blower ( 122 ) is positioned proximate the first evaporator ( 108 ) and configured to blow air over the first evaporator ( 108 ).
- the air is cooled when passed over the first evaporator ( 108 ) and can be introduced into a compartment for cooling purpose.
- the second air blower ( 124 ) is positioned proximate the second evaporator ( 110 ) and configured to blow air over the second evaporator ( 110 ).
- the air is cooled when passing the second evaporator ( 110 ) and can be introduced into another compartment or a different area of the same compartment for cooling purpose.
- the third air blower ( 126 ) is positioned proximate the condenser ( 106 ) and configured to blow air over the condenser ( 106 ) to cool it. When passing over the condenser ( 106 ), the air extracts the heat away from the condenser ( 106 ) and thus enhances the performance of the condenser ( 106 ).
- the air conditioning system ( 300 ) of the present invention includes more than one sensor for measuring airflows over the evaporators.
- the air conditioning system ( 300 ) in addition to the first sensor ( 128 ), the air conditioning system ( 300 ), as illustrated, includes a second sensor ( 306 ) configured to perform one or more of the following: (iii) measure temperature of the second evaporator and (iv) measure the airflow passing over the second evaporator ( 116 ).
- the controller ( 132 ) is electrically coupled to both the first and second sensors ( 128 , 306 ) and configured to automatically control the first, second, third and fourth shut-off valves ( 112 , 114 , 302 , 304 ) based on the measured temperatures or the measured airflows.
- the controller ( 132 ) is configured to automatically perform or send instructions to perform one or more of the following: (i) close the first and second shut-off valves ( 112 , 114 ) when the measured temperature of the first evaporator ( 108 ) is lower than a first predetermined temperature, or when the measured airflow passing over the first evaporator ( 108 ) is less than a first predetermined volume; (ii) open the first and second shut-off valves ( 112 , 114 ) when the measured temperature of the first evaporator ( 108 ) exceeds the first predetermined temperature, or when the measured airflow passing over the first evaporator ( 108 ) is equal to or greater than the first predetermined volume; (iii) close the third and fourth shut-off valves ( 302 , 304 ) when the measured temperature of the second evaporator ( 110 ) is lower than a second predetermined temperature, or when the measured airflow passing over the second evaporator ( 110 ) is less than
- an air conditioning system of the present invention includes more than two evaporators.
- FIG. 4 illustrates an air conditioning system ( 400 ) having three evaporators.
- the air conditioning system ( 400 ) includes a third evaporator ( 402 ).
- the third evaporator ( 402 ) is fluidly coupled to the first and second evaporators ( 108 , 110 ) in parallel by refrigerant lines ( 140 - 3 , 140 - 4 , 406 ).
- the third evaporator ( 402 ) is in thermal communication with a third compartment.
- the third compartment can be a compartment separated from the first and second compartments or an area in the first or second compartment.
- the air conditioning system ( 400 ) includes a third metering device ( 404 ) disposed at the refrigerant line ( 406 ) upstream of the third evaporator ( 402 ).
- the third metering device ( 404 ) is configured to control flow of the refrigerant into the third evaporator ( 402 ).
- the air conditioning system ( 400 ) includes the first and second shut-off valves ( 112 , 114 ) installed at the refrigerant inlet and outlet of the first evaporator ( 108 ) to prevent undesired collection of the refrigerant in the first evaporator ( 108 ).
- the air conditioning system ( 400 ) further includes the third and fourth shut-off valves, such as those ( 302 , 304 ) illustrated in FIG. 3 , installed at the refrigerant inlet and outlet of the second evaporator ( 110 ) to prevent undesired collection of the refrigerant in the second evaporator ( 110 ).
- the air conditioning system ( 400 ) further includes another pair of shut-off valves installed at the refrigerant inlet and outlet of the third evaporator ( 402 ) to prevent undesired collection of the refrigerant in the third evaporator ( 402 ).
- an air conditioning system of the present invention is electrically, fluidly, thermally or mechanically coupled with other components, devices or systems.
- an air conditioning system e.g., 100 , 200 , 300 , or 400
- a heating system to form a combined heating and cooling air conditioning system.
- the combination of an air conditioning system with a heating system can be achieved in a similar way as those described in U.S. Pat. No. 8,517,087, which is expressly incorporated by reference in their entirety, and in particular with reference to the heating system.
- an air conditioning system (e.g., 100 , 200 , 300 , or 400 ) of the present invention is coupled to a vehicle ventilation module to provide conditioned fresh air to the desired compartment(s).
- the vehicle ventilation module can be the same as or similar to those described in U.S. Publication No. 2014/0262132, which is expressly incorporated by reference in their entirety, and in particular with reference to the vehicle ventilation module.
- a first evaporator could be termed a second evaporator, and, similarly, a second evaporator could be termed a first evaporator, without changing the meaning of the description, so long as all occurrences of the “first evaporator” are renamed consistently and all occurrences of the “second evaporator” are renamed consistently.
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Abstract
Description
- The present invention generally relates to vehicle air conditioning systems, and more particularly, to over-the-road and off-road vehicle air conditioning systems that can prevent undesired collection of refrigerant in one or more evaporators.
- In response to the needs of the transportation industry and the regulations governing the amount of time that a driver may spend behind the wheel, many vehicles include a cab compartment and a sleeper compartment where the driver or passenger can rest. To create a comfortable environment for drivers and passengers, vehicle heating, ventilation, and air conditioning (HVAC) systems have been developed to provide conditioned air to the cab and sleeper compartments.
- Such vehicle HVAC systems may include multiple evaporators, one for each compartment. For example, a system may include a cab evaporator (e.g., an evaporator associated with the cab compartment to cool the cab compartment) and a sleeper evaporator (e.g., an evaporator associated with the sleeper compartment to cool the sleeper compartment). Such systems may also include multiple compressors connected to different power sources so that the vehicle HVAC systems can be operated when the engine of the vehicle is on and when it is off.
- To meet a specific cooling demand and reduce waste of compressed and condensed refrigerant, the systems may be operated to allow the compressed and condensed refrigerant to pass through one or more of the evaporators while restricting the condensed refrigerant from passing through other evaporator(s). For example, in a case where cooling in the sleeper compartment is not desired (e.g., the sleeper compartment is not occupied), the systems may be operated to restrict the refrigerant from passing through the sleeper evaporator to reduce waste of the compressed and condensed refrigerant on an unoccupied compartment. Similarly, in a case where cooling in the cab compartment is not desired, the systems may be operated to restrict the refrigerant from passing through the cab compartment.
- While restricting the refrigerant from passing through the non-operating evaporator or evaporators (e.g., the sleeper evaporator when cooling in the sleeper compartment is not desired or the cab evaporator where cooling in the cab compartment is not desired), conventional systems cannot prevent the collection or accumulation of the refrigerant in the non-operating evaporator(s), in particular at the lower pressure side of the non-operating evaporator(s). The collection or accumulation of the refrigerant in the non-operating evaporator(s) reduces the effective amount of the refrigerant that should be used to cool the compartment(s) in need of cooling, making it difficult to meet (in some circumstances, only partially meet) the cooling demand. Consequently, the cooling capacity and overall efficiency of the HVAC systems are reduced, and the operational costs are increased.
- Given the above background, there is a need in the art for air conditioning systems with enhanced cooling efficiency and capacity that provide conditioned air to multiple compartments and that prevent undesired collection of refrigerant in non-operating evaporators.
- The information disclosed in this Background section is provided for an understanding of the general background of the invention and is not an acknowledgement or suggestion that this information forms part of the prior art already known to a person skilled in the art.
- Various aspects of the present invention provide air conditioning systems with enhanced cooling efficiency and capacity that provide conditioned air to multiple compartments and that prevent the undesired collection of refrigerant in non-operating evaporators.
- In one embodiment, the present invention provides an air conditioning system for use in a vehicle having two or more compartments. The air conditioning system includes at least one compressor, a condenser disposed downstream of the at least one compressor, a plurality of evaporators disposed downstream of the condenser, a plurality of shut-off valves and refrigerant lines. The refrigerant lines fluidly connect the at least one compressor, the condenser, and the plurality of evaporators to form a refrigerant circuit for circulating the refrigerant.
- In a preferred embodiment, the plurality of evaporators includes a first evaporator and a second evaporator fluidly coupled to each other in parallel. When implemented in the vehicle, the first evaporator is in thermal communication with a first compartment of the vehicle to cool the first compartment and the second evaporator is in thermal communication with a second compartment of the vehicle to cool the second compartment. The plurality of shut-off valves includes a first shut-off valve and a second shut-off valve. The first shut-off valve is installed at a refrigerant inlet of the first evaporator and the second shut-off valve is installed at a refrigerant outlet of the first evaporator. The first and second shut-off valves are controlled to prevent refrigerant from collecting in the first evaporator. In some embodiments, the first and second shut-off valves are controlled to prevent refrigerant from collecting in the first evaporator when airflow over or through the first evaporator is less than a first predetermined volume.
- In some embodiments, the air conditioning system further includes a first sensor and a controller electrically coupled to the first sensor and the first and second shot-off valves. The first sensor is configured to perform one or more of the following: (i) measure temperature of the first evaporator and (ii) measure airflow passing over the first evaporator. The controller is configured to control the operation of the first and second shut-off valves in accordance with the measured temperature or the measured airflow or both. In some embodiments, the controller is configured to automatically close the first and second shut-off valves when the measured temperature of the first evaporator is lower than a first predetermined temperature, or when the measured airflow passing over the first evaporator is less than a first predetermined volume, and to automatically open the first and second shut-off valves when the measured temperature of the first evaporator exceeds the first predetermined temperature, or when the measured airflow passing over the first evaporator is equal to or greater than the first predetermined volume. In an embodiment, the method includes manually and selectively opening or closing the first and second shut-off valves in accordance with temperature of the first evaporator or airflow passing over the first evaporator.
- In another embodiment, the present invention provides an air conditioning system for use in a vehicle having two or more compartments. The air conditioning system includes at least one compressor, a condenser disposed downstream of the at least one compressor, a plurality of evaporators disposed downstream of the condenser, a plurality of shut-off valves, refrigerant lines, a first sensor and a controller. The refrigerant lines fluidly connect the at least one compressor, the condenser, and the plurality of evaporators to form a refrigerant circuit for circulating the refrigerant.
- In one embodiment, the plurality of evaporators includes a first evaporator and a second evaporator fluidly coupled to each other in parallel. The plurality of shut-off valves includes a first shut-off valve and a second shut-off valve. The first shut-off valve is installed at a refrigerant inlet of the first evaporator and the second shut-off valve is installed at a refrigerant outlet of the first evaporator. The first sensor is configured to perform one or more of the following: (i) measure temperature of the first evaporator and (ii) measure airflow passing over the first evaporator. The controller is electrically coupled to the first sensor and configured to control the operation of the first and second shut-off valves in accordance with the measured temperature or the measured airflow or both. In some embodiments, the controller is configured to automatically close the first and second shut-off valves when the measured temperature of the first evaporator is lower than a first predetermined temperature, or when the measured airflow passing over the first evaporator is less than a first predetermined volume, and to automatically open the first and second shut-off valves when the measured temperature of the first evaporator exceeds the first predetermined temperature, or when the measured airflow passing over the first evaporator is equal to or greater than the first predetermined volume.
- In an embodiment, the plurality of shut-off valves includes a third shut-off valve and a fourth shut-off valve. The third shut-off valve is installed at a refrigerant inlet of the second evaporator and the fourth shut-off valve is installed at a refrigerant outlet of the second evaporator to prevent refrigerant from collecting in the second evaporator. In some embodiments, the third shut-off valve and the fourth shut-off valve are controlled to prevent refrigerant from collecting in the second evaporator when airflow over the second evaporator is less than a second predetermined volume. In some embodiments, the system includes a second sensor configured to perform one or more of the following: (iii) measure temperature of the second evaporator and (iv) measure airflow passing over the second evaporator. In some embodiments, the controller is electrically coupled to the second sensor and configured to control the operation of the third and fourth shut-off valves in accordance with the measured temperature and the measured airflow. In some embodiments, the controller is configured to automatically close the third and fourth shut-off valves when the measured temperature of the second evaporator is lower than a second predetermined temperature, or when the measured airflow passing over the second evaporator is less than a second predetermined volume, and to automatically open the third and fourth shut-off valves when the measured temperature of the second evaporator exceeds the second predetermined temperature, or when the measured airflow passing over the second evaporator is equal to or greater than the second predetermined volume.
- The systems of the present invention have other features and advantages that will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention.
- The accompanying drawings, which are incorporated into and constitute a part of this specification, illustrate one or more embodiments of the present application and, together with the detailed description, serve to explain the principles and implementations of the application.
-
FIG. 1 is a block diagram illustrating a first exemplary air conditioning system. -
FIG. 2 is a block diagram illustrating a second exemplary air conditioning system. -
FIG. 3 is a block diagram illustrating a third exemplary air conditioning system. -
FIG. 4 is a block diagram illustrating a fourth exemplary air conditioning system. -
FIG. 5 is a schematic diagram illustrating an implementation of an air conditioning system in a vehicle. -
FIG. 6 is a schematic diagram illustrating an alternative implementation of an air conditioning system in a vehicle. -
FIG. 7 is a schematic diagram illustrating another alternative implementation of an air conditioning system in a vehicle. - Reference will now be made in detail to implementations of the present application as illustrated in the accompanying drawings. The same reference indicators will be used throughout the drawings and the following detailed description to refer to the same or like parts. Those of ordinary skill in the art will realize that the following detailed description of the present application is illustrative only and is not intended to be in any way limiting. Other embodiments of the present application will readily suggest themselves to such skilled persons having benefit of this disclosure.
- In the interest of clarity, not all of the routine features of the implementations described herein are shown and described. It will, of course, be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with application- and business-related constraints, and that these specific goals will vary from one implementation to another and from one developer to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking of engineering for those of ordinary skill in the art having the benefit of this disclosure.
- Many modifications and variations of this disclosure can be made without departing from its spirit and scope, as will be apparent to those skilled in the art. The specific embodiments described herein are offered by way of example only, and the disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled.
- Embodiments of the present invention are described in the context of air conditioning systems for use in vehicles, and in particular, in the context of air conditioning systems to cool different compartments or different spaces of an over-the-road or off-road vehicle. The vehicle can be a car, a van, a truck, a bus, a trailer, or other automobiles.
- Generally, an air conditioning system of the present invention includes at least one compressor, a condenser, a plurality of evaporators and refrigerant lines. The refrigerant lines fluidly connect the compressor, condenser and evaporators to form a refrigerant circuit. The air conditioning system of the present invention also includes a plurality of shut-off valves disposed at the refrigerant circuit to prevent undesired collection of refrigerant in one or more of the evaporators, and thus enhance the cooling effect or capacity of the HVAC systems. In some embodiments, the air conditioning system of the present invention includes a controller electrically coupled to the shut-off valves to control the operation of the valves. In some embodiments, the controller is electrically coupled to other components of the air conditioning system (e.g., a compressor or a condenser or both) to control operation of these components.
- By way of illustration,
FIG. 1 depicts an air conditioning system (100) including a first compressor (102), a second compressor (104), a condenser (106), a first evaporator (108), a second evaporator (110), a first shut-off valve (112) and a second shut-off valve (114). The first and second compressors, the condenser, the first and second evaporators, and the first and second valves are fluidly connected by refrigerant lines (104-1, 104-2, etc.) to form a refrigerant circuit (138). - In the illustrated embodiment, the first and second compressors (102, 104) are fluidly connected to each other in parallel by refrigerant lines (140-5, 140-6) and are configured for compressing a refrigerant. In some embodiments, the first compressor (102) is configured to connect to an internal combustion engine of the vehicle and is driven through a belt and pulley system by the internal combustion engine when the internal combustion engine is running. In some embodiments, the second compressor (104) is configured to operate when the internal combustion engine (134) of the vehicle is not running, for example, by connecting to an electrical power source (136) such as a battery. With the first and second compressors (102, 104) in place, the air conditioning system of the present invention can be operated when the engine is on as well as when the engine is off. In some embodiments, the first and second compressors (102, 104) are belt-driven compressors, electrically-driven compressors, or any other suitable compressors.
- In some embodiments, an air conditioning system of the present invention has one compressor. For example, as illustrated in
FIG. 2 , the air conditioning system (200) of the present invention has one compressor (202). The compressor (202) can be a compressor driven by the engine (e.g., the same as or similar to thefirst compressor 102 inFIG. 1 ) or driven by a battery or other power sources (e.g., thesecond compressor 104 inFIG. 1 ). - Turning back to
FIG. 1 , the condenser (106) is disposed downstream of the first and second compressors (102, 104) and fluidly connected to the first and second compressors (102, 104) by a refrigerant line (140-1). The condenser (106) is configured to condense the refrigerant compressed by the first or second compressor or both. As used herein, the term “downstream” refers to a position along a refrigerant line in the direction of the refrigerant flow. As used herein, the term “upstream” refers to a position along a refrigerant line opposite to the direction of the refrigerant flow. For example,FIG. 1 illustrates the condenser (106) disposed downstream of the first and second compressors (102, 104) and upstream of the evaporator (108), where the directions of the refrigerant flow are indicated by the arrows. - The first and second evaporators (108, 110) are disposed downstream of the condenser (106) and fluidly connected to the condenser (106) by a refrigerant line (140-2). The first and second evaporators (108, 110) are fluidly coupled to each other in parallel via refrigerant lines (140-3, 140-4) and configured to evaporate the condensed refrigerant. The first shut-off valve (112) is installed at the refrigerant inlet of the first evaporator (108), and the second shut-off valve (114) is installed at the refrigerant out of the first evaporator (108).
- As used herein, the term “refrigerant inlet” refers to an inlet of a corresponding evaporator and a portion of a refrigerant line upstream of the corresponding evaporator. As used herein, the term “refrigerant outlet” refers to an outlet of a corresponding evaporator and a portion of a refrigerant line downstream of the corresponding evaporator. For example, refrigerant inlet of the first evaporator refers to the inlet of the first evaporator (108) and a portion of the refrigerant line (140-3) upstream of the first evaporator (108). Refrigerant outlet of the first evaporator (108) refers to the outlet of the first evaporator (108) and a portion of the refrigerant line (140-3) downstream of the first evaporator (108).
- In some embodiments, the first evaporator (108) is in thermal communication with a first compartment and the second evaporator (110) is in thermal communication with a second compartment to cool the first and second compartments. As used herein, the term “in thermal communication” refers to one or more of the following: (i) the respective evaporator is mounted within a corresponding compartment to exchange heat with that compartment or with the air in that compartment, and (ii) the respective evaporator is coupled with a device (e.g., heat exchanger or air blower) which introduces conditioned air into that compartment.
- In some embodiments, the first evaporator (108) is mounted in the first compartment and the second evaporator (110) is mounted in the second compartment. In some embodiments, the first compartment can be separated from the second compartment, for example, by a wall or other barrier such as a curtain. In some embodiments, the first compartment and the second compartment are different areas within the same space. In some embodiments, the first compartment is a cab compartment, a sleeper compartment, or any other compartment in a vehicle.
- As an example,
FIG. 5 illustrates an implementation of the air conditioning system (100) in a vehicle (502). The vehicle (502) has a cab compartment (504) where an operator or driver operates the vehicle and a sleeper compartment (506) where the operator or driver can rest. In the illustrated embodiment, first evaporator (108) is in thermal communication with the cab compartment (504), while second evaporator (110) is in thermal communication with the sleeper compartment (506). - When cooling is desired in both cab and sleeper compartments, first and second shut-off valves (112, 114) are opened, either manually or automatically, so that the condensed refrigerant flows through both the first and second evaporators (108, 110) and provides cooling to both the cab and sleeper compartments. When cooling is only desired in the sleeper compartment (e.g., when the vehicle is parked and no one is in the cab compartment), the first and second shut-off valves (112, 114) are closed. Since the first and second shut-off valves (112, 114) are installed at both the refrigerant inlet and outlet of the first evaporator (108), closing the first and second shut-off valves (112, 114) prevents the refrigerant from entering the first evaporator (108) from both sides and thus prevents the refrigerant from collecting or accumulating in the first evaporator (108). As a result, the condensed refrigerant flows only through the second evaporator (110) and thus enhances the cooling effect of the second evaporator (110).
- As another example,
FIG. 6 illustrates an alternative implementation of the air conditioning system (100) of the present invention in the vehicle (502), where the first evaporator (108) is in thermal communication with the sleeper compartment (506) and the second evaporator (110) is in thermal communication with the cab compartment (504). In such an embodiment, when cooling is desired in both the cab and sleeper compartments, the first and second shut-off valves (112, 114) are opened, either manually or automatically, so that the condensed refrigerant flows through both the first and second evaporators (108, 110) and provides cooling to both cab and sleeper compartments. When cooling is only desired in the cab compartment (e.g., no one is in the sleeper compartment), the first and second shut-off valves (112, 114) are closed. Similar to the embodiment illustrated inFIG. 5 , closing the first and second shut-off valves (112, 114) prevents the refrigerant from entering into the first evaporator (108) from both sides and thus prevents the refrigerant from collecting or accumulating in the first evaporator (108). As a result, the condensed refrigerant flows only through the second evaporator (110) and thus enhances the cooling effect of the second evaporator (110). - In some embodiments, the first and second shut-off valves are operated (e.g., opened or closed) manually, for example, by a driver of the vehicle who desires more cooling in a compartment/area or wants no cooling at all in the compartment/area. In some embodiments, the first or second shut-off valve or both are operated automatically, for example, by a controller (132). In some embodiments, operating the first and second shut-off valves depends on other parameters or operations of other components in the air conditioning system. For example, when airflow over the first evaporator is less than a first predetermined volume (e.g., indicating cooling is undesired in the compartment associated with the first evaporator), the first and second shut-off valves are manually or automatically closed to prevent refrigerant from collecting in the first evaporator. The first predetermined volume can be preset or reset in accordance with the type of vehicle, compartments associated with the first evaporator, preference of the drivers/operators/passengers, ambient temperature or other parameters. In an example, the first predetermined volume is at most 75 Cubic Feet per Minute (CFM), indicating cooling is undesired in the compartment associated with the first evaporator.
- In some embodiments, an air conditioning system of the present invention includes more than two shut-off valves. As an example,
FIG. 3 illustrates an air conditioning system (300) having four shut-off valves, andFIG. 7 depicts an implementation of the air conditioning system (300) in the vehicle (502). In addition to the first and second shut-off valves (112, 114), the air conditioning system (300) includes a third shut-off valve (302) and a fourth shut-off valve (304). The third and fourth shut-off valves (302, 304) are installed at the refrigerant inlet and outlet of the second evaporator (110). Like the first and second shut-off valves (112, 114), the third and fourth shut-off valves (302, 304) can be opened/closed, manually or automatically. Similar to the first and second shut-off valves (112, 114), closing the third and fourth shut-off valves (302, 304) prevents the refrigerant from entering into the second evaporator (110) from both sides and thus prevents the refrigerant from collecting or accumulating in the second evaporator (110). As a result, the condensed refrigerant flows only through the first evaporator (108) and thus enhances the cooling effect of the second evaporator (108). - Like the first and second shut-off valves (112, 114), operation of the third and fourth shut-off valves (302, 304) can depend on other parameters or operations of other components in the air conditioning system. In some embodiments, the first, second, third and fourth shut-off valves are selectively and independently controlled. For example, when airflow over the second evaporator is less than a second predetermined volume (e.g., indicating cooling is undesired in the compartment associated with the second evaporator), the third and fourth shut-off valves are manually or automatically closed to prevent refrigerant from collecting in the second evaporator. Like the first predetermined volume, the second predetermined volume can be preset or reset in accordance with the type of vehicle, compartments associated with the second evaporator, desire of drivers/operators, or other parameters. The second predetermined volume can be the same as or different from the first predetermined volume. In an example, the second predetermined volume is at most 75 Cubic Feet per Minute (CFM), indicating cooling is undesired in the compartment associated with the second evaporator.
- Turning back to
FIG. 1 , in some embodiments, the air conditioning system (100) of the present invention includes a first sensor (128) and a controller (132) electrically coupled to the first sensor (128). In some embodiments, the control (132) is an intelligent power generation management controller described in U.S. Publication No. 2007/0131408 and U.S. Pat. Nos. 7,591,143 and 8,453,722, all of which are expressly incorporated by reference in their entirety, and in particular with reference to intelligent power generation management controllers. - The first sensor (128) is configured to perform one or more of the following: (i) measure temperature of the first evaporator (108) and (ii) measure the airflow passing over the first evaporator (108). When the measured temperature is lower than a first predetermined temperature, or the measured airflow passing over the first evaporator (108) is less than the first predetermined volume (e.g., 75 CFM), or both, the controller (132) automatically closes or sends instruction to close the first and second shut-off valves (112, 114). When the measured temperature exceeds the first predetermined temperature or when the measured airflow passing over the first evaporator is equal to or greater than the first predetermined volume, the controller (132) automatically opens or sends instruction to open the first and second shut-off valves (112, 114). In some embodiments, the controller (132) is electrically coupled to one or more other components in the air conditioning system. For example, in one embodiment, the controller (132) is electrically coupled to the first compressor (102) or the second compressor (104) or both to automatically control the operation of the compressors in accordance with ambient temperature, operation of the engine, the cooling demand of the compartments of the vehicle, or other parameters.
- In some embodiments, the air conditioning system (100) of the present invention includes a plurality of control valves to selectively restrict or permit flow of the refrigerant to the compressors. As an example,
FIG. 1 illustrates the air conditioning system (100) having a first flow control valve (129) and a second flow control valve (130). The first flow control valve (129) is disposed at the refrigerant line (104-5) upstream of the first compressor (102) and configured to selectively restrict or permit flow of the refrigerant to the first compressor (102). The second flow control valve (130) is disposed at the refrigerant line (104-6) upstream of the second compressor (104) and configured to selectively restrict or permit flow of the refrigerant to the second compressor (104). In some embodiments, the operation of the flow control valves is automatically controlled by the controller. - In some embodiments, the air conditioning system (100) of the present invention includes a plurality of metering devices to control flow of the refrigerant into the evaporators. As an example,
FIG. 1 illustrates the air conditioning system (100) having a first metering device (116) and a second metering device (118). The first metering device (116) is disposed at the refrigerant line (104-3) between the first shut off valve (112) and the first evaporator (108) and configured for controlling flow rate of the refrigerant into the first evaporator (108). The second metering device (118) is disposed at the refrigerant line (104-4) upstream of the second evaporator (110) and configured for controlling flow rate of the refrigerant into the second evaporator (110). In some embodiments, the first and the second metering devices are thermal expansion valves. In some embodiments, the operation of the metering devices is automatically controlled by the controller. - In some embodiments, the air conditioning system (100) of the present invention includes a receiver/drier (120). The receiver/drier (120) is disposed at the refrigerant line (104-3) between the condenser (106) and the evaporators (108, 110). The receiver/drier (120) is configured to temporarily store the refrigerant, absorb moisture from the refrigerant, or both.
- In some embodiments, the air conditioning system (100) of the present invention includes a plurality of air blowers to enhance the performance of some components in the air conditioning system. As an example,
FIG. 1 illustrates the air conditioning system (100) having a first air blower (122), a second air blower (124) and a third air blower (126). The first air blower (122) is positioned proximate the first evaporator (108) and configured to blow air over the first evaporator (108). The air is cooled when passed over the first evaporator (108) and can be introduced into a compartment for cooling purpose. Similarly, the second air blower (124) is positioned proximate the second evaporator (110) and configured to blow air over the second evaporator (110). The air is cooled when passing the second evaporator (110) and can be introduced into another compartment or a different area of the same compartment for cooling purpose. The third air blower (126) is positioned proximate the condenser (106) and configured to blow air over the condenser (106) to cool it. When passing over the condenser (106), the air extracts the heat away from the condenser (106) and thus enhances the performance of the condenser (106). - Referring now to
FIG. 3 , in some embodiments, the air conditioning system (300) of the present invention includes more than one sensor for measuring airflows over the evaporators. For example, in addition to the first sensor (128), the air conditioning system (300), as illustrated, includes a second sensor (306) configured to perform one or more of the following: (iii) measure temperature of the second evaporator and (iv) measure the airflow passing over the second evaporator (116). In some embodiments, the controller (132) is electrically coupled to both the first and second sensors (128, 306) and configured to automatically control the first, second, third and fourth shut-off valves (112, 114, 302, 304) based on the measured temperatures or the measured airflows. In some embodiments, the controller (132) is configured to automatically perform or send instructions to perform one or more of the following: (i) close the first and second shut-off valves (112, 114) when the measured temperature of the first evaporator (108) is lower than a first predetermined temperature, or when the measured airflow passing over the first evaporator (108) is less than a first predetermined volume; (ii) open the first and second shut-off valves (112, 114) when the measured temperature of the first evaporator (108) exceeds the first predetermined temperature, or when the measured airflow passing over the first evaporator (108) is equal to or greater than the first predetermined volume; (iii) close the third and fourth shut-off valves (302, 304) when the measured temperature of the second evaporator (110) is lower than a second predetermined temperature, or when the measured airflow passing over the second evaporator (110) is less than a second predetermined volume; and (iv) open the third and fourth shut-off valves (302, 304) when the measured temperature of the second evaporator (110) exceeds the second predetermined temperature, or when the measured airflow passing over the second evaporator (110) is equal to or greater than the second predetermined volume. In some embodiments, one or more of the first, second, third and fourth shut-off valves (112, 114, 302, 304) are performed manually and selectively in accordance with the measured temperatures, airflows, or other factors. - In some embodiments, an air conditioning system of the present invention includes more than two evaporators. As an example,
FIG. 4 illustrates an air conditioning system (400) having three evaporators. In addition to the first and second evaporator (108, 110), the air conditioning system (400) includes a third evaporator (402). The third evaporator (402) is fluidly coupled to the first and second evaporators (108, 110) in parallel by refrigerant lines (140-3, 140-4, 406). The third evaporator (402) is in thermal communication with a third compartment. The third compartment can be a compartment separated from the first and second compartments or an area in the first or second compartment. In some embodiments, the air conditioning system (400) includes a third metering device (404) disposed at the refrigerant line (406) upstream of the third evaporator (402). The third metering device (404) is configured to control flow of the refrigerant into the third evaporator (402). - In some embodiments, the air conditioning system (400) includes the first and second shut-off valves (112, 114) installed at the refrigerant inlet and outlet of the first evaporator (108) to prevent undesired collection of the refrigerant in the first evaporator (108). In some embodiments, the air conditioning system (400) further includes the third and fourth shut-off valves, such as those (302, 304) illustrated in
FIG. 3 , installed at the refrigerant inlet and outlet of the second evaporator (110) to prevent undesired collection of the refrigerant in the second evaporator (110). In some embodiments, the air conditioning system (400) further includes another pair of shut-off valves installed at the refrigerant inlet and outlet of the third evaporator (402) to prevent undesired collection of the refrigerant in the third evaporator (402). - In some embodiments, an air conditioning system of the present invention is electrically, fluidly, thermally or mechanically coupled with other components, devices or systems. For example, an air conditioning system (e.g., 100, 200, 300, or 400) of the present invention is combined with a heating system to form a combined heating and cooling air conditioning system. The combination of an air conditioning system with a heating system can be achieved in a similar way as those described in U.S. Pat. No. 8,517,087, which is expressly incorporated by reference in their entirety, and in particular with reference to the heating system.
- As another example, an air conditioning system (e.g., 100, 200, 300, or 400) of the present invention is coupled to a vehicle ventilation module to provide conditioned fresh air to the desired compartment(s). The vehicle ventilation module can be the same as or similar to those described in U.S. Publication No. 2014/0262132, which is expressly incorporated by reference in their entirety, and in particular with reference to the vehicle ventilation module.
- The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the claims. As used in the description of the implementations and the appended claims, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that, although the terms “first,” “second,” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first evaporator could be termed a second evaporator, and, similarly, a second evaporator could be termed a first evaporator, without changing the meaning of the description, so long as all occurrences of the “first evaporator” are renamed consistently and all occurrences of the “second evaporator” are renamed consistently.
Claims (21)
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CN201680081314.6A CN108778800B (en) | 2015-12-10 | 2016-12-09 | Air conditioning system for vehicle |
PCT/US2016/065812 WO2017100561A1 (en) | 2015-12-10 | 2016-12-09 | Air conditioning system for use in vehicle |
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US14/965,142 US10006684B2 (en) | 2015-12-10 | 2015-12-10 | Air conditioning system for use in vehicle |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190092117A1 (en) * | 2017-09-26 | 2019-03-28 | Emerson Climate Technologies, Inc. | Evaporator Freeze Prevention Systems and Methods |
US10845064B2 (en) * | 2017-02-15 | 2020-11-24 | Johnson Controls Technology Company | Heating, ventilation, and air conditioning control system |
US10967699B2 (en) * | 2018-06-11 | 2021-04-06 | Paccar Inc | Systems and methods for reducing slugging in HVAC compressor of vehicle |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018226649A1 (en) * | 2017-06-06 | 2018-12-13 | Carrier Corporation | Transport refrigeration system |
US20180361830A1 (en) * | 2017-06-19 | 2018-12-20 | Ford Global Technologies, Llc | Dual electric drive a/c compressor system and method |
US11207949B2 (en) | 2020-01-07 | 2021-12-28 | Ford Global Technologies, Llc | Multi-compressor refrigerant system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3948060A (en) * | 1972-05-24 | 1976-04-06 | Andre Jean Gaspard | Air conditioning system particularly for producing refrigerated air |
US6543245B1 (en) * | 2001-11-08 | 2003-04-08 | Thermo King Corporation | Multi-temperature cold plate refrigeration system |
US20050257545A1 (en) * | 2004-05-24 | 2005-11-24 | Ziehr Lawrence P | Dual compressor HVAC system |
US7765824B2 (en) * | 2006-02-01 | 2010-08-03 | Paccar Inc | Vehicle interior cooling system |
US8001799B2 (en) * | 2006-07-12 | 2011-08-23 | Denso Corporation | Multiple cooling sources for a vehicle air conditioning system |
Family Cites Families (176)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2722050A (en) | 1949-03-03 | 1955-11-01 | Gibson Refrigerator Co | Method of making a fluid chamber |
US2789234A (en) | 1956-01-16 | 1957-04-16 | Eastern Malleable Iron Company | Auxiliary power unit for vehicles |
US3590910A (en) | 1970-01-02 | 1971-07-06 | Trane Co | Heating-cooling air-conditioning system control |
US3627030A (en) | 1970-01-02 | 1971-12-14 | Trane Co | Heating cooling dehumidifying airconditioning system control |
US3807087A (en) | 1972-10-10 | 1974-04-30 | Mattel Inc | Automatic battery cut-off system for electric motor-driven toy vehicles using rechargeable batteries |
US3844130A (en) | 1973-07-09 | 1974-10-29 | M Wahnish | Automobile air conditioning system employing auxiliary prime motor |
US3885398A (en) | 1973-12-10 | 1975-05-27 | Claude W Dawkins | Air conditioning system for a motor home vehicle or the like |
US4459519A (en) | 1974-06-24 | 1984-07-10 | General Electric Company | Electronically commutated motor systems and control therefor |
US5227704A (en) | 1974-06-24 | 1993-07-13 | General Electric Company | Motor controls, refrigeration systems and methods of motor operation and control |
US4015182A (en) | 1974-06-24 | 1977-03-29 | General Electric Company | Refrigeration system and control therefor |
US3995443A (en) | 1975-01-02 | 1976-12-07 | Iversen Rudolf O | Air conditioning system |
US4280330A (en) | 1977-09-19 | 1981-07-28 | Verdell Harris | Vehicle heating and cooling system |
US4271677A (en) | 1978-03-27 | 1981-06-09 | Forrest Harr | Self-contained roof-mounted vehicle air-conditioning system |
US4217764A (en) | 1978-07-05 | 1980-08-19 | Sheller-Globe Corporation | Roof mounted motor vehicle air conditioner |
US4577679A (en) | 1978-10-25 | 1986-03-25 | Hibshman Henry J | Storage systems for heat or cold including aquifers |
US4324286A (en) | 1980-03-24 | 1982-04-13 | The Trane Company | Control for vehicle temperature conditioning system |
JPS6033099Y2 (en) | 1980-04-22 | 1985-10-02 | 本田技研工業株式会社 | Seat mounting device |
US4412425A (en) | 1980-12-09 | 1983-11-01 | Nippon Soken, Inc. | Air conditioning and ventilation system |
US4448157A (en) | 1982-03-08 | 1984-05-15 | Eckstein Robert J | Auxiliary power unit for vehicles |
US4617472A (en) | 1983-07-19 | 1986-10-14 | Nuvatec, Inc. | Recreational vehicle power control system |
JPH0758069B2 (en) | 1983-09-09 | 1995-06-21 | 株式会社日立製作所 | Compressor motor controller |
SE438061B (en) | 1984-02-01 | 1985-03-25 | Thermo Produkter B S Ab | KYLANLEGGNING |
US4641502A (en) | 1985-01-09 | 1987-02-10 | The Duo-Therm Corporation | Roof mount air conditioner |
JPS61210238A (en) | 1985-03-15 | 1986-09-18 | Nissan Motor Co Ltd | Number of idling revolutions control device |
US4667480A (en) | 1986-09-22 | 1987-05-26 | General Electric Company | Method and apparatus for controlling an electrically driven automotive air conditioner |
US4945977A (en) | 1987-01-05 | 1990-08-07 | Agaro Raymond D | Combination vehicle heating and cooling system |
US4893479A (en) | 1987-03-20 | 1990-01-16 | Ranco Electronics Division | Compressor drive system |
US4748825A (en) | 1987-10-29 | 1988-06-07 | Thermo King Corporation | Bus air conditioning unit |
US4825663A (en) | 1987-11-16 | 1989-05-02 | Paccar Inc. | Auxiliary air conditioning system for trucks and other heavy duty vehicles |
US4982576A (en) | 1987-12-10 | 1991-01-08 | Murray Corporation | Air conditioner charging station with same refrigerant return and method |
US4841733A (en) | 1988-01-07 | 1989-06-27 | Dussault David R | Dri-Pc humidity and temperature controller |
US4856078A (en) | 1988-03-23 | 1989-08-08 | Zenith Electronics Corporation | DC fan speed control |
FI79810C (en) | 1988-03-30 | 1990-03-12 | Kalervo Virtanen | UPPVAERMNINGS- OCH LUFTKONDITIONERINGSSYSTEM I EN BUSS. |
US5067652A (en) | 1989-03-02 | 1991-11-26 | Enander Harold R | Supplemental vehicle heating method and apparatus with long heating cycle |
US5025634A (en) | 1989-04-25 | 1991-06-25 | Dressler William E | Heating and cooling apparatus |
US4947657A (en) | 1989-06-05 | 1990-08-14 | Kalmbach John F | Auxiliary air conditioning apparatus and method for air conditioned vehicles |
US5125236A (en) | 1989-09-15 | 1992-06-30 | Onan Corporation | Combined generator set and air conditioning compressor drive system |
US5095308A (en) | 1990-01-09 | 1992-03-10 | Southern Marine Research, Inc. | Transceiver with battery saver and method of using same |
US5046327A (en) | 1990-07-17 | 1991-09-10 | Walker Steve A | Air conditioner conversion kits for vans and recreational vehicles |
US5396779A (en) | 1990-09-14 | 1995-03-14 | Nartron Corporation | Environmental control system |
US5316074A (en) | 1990-10-12 | 1994-05-31 | Nippondenso Co., Ltd. | Automotive hair conditioner |
JP2747379B2 (en) | 1991-05-31 | 1998-05-06 | 昭和アルミニウム株式会社 | Heat exchanger |
US5307645A (en) | 1991-07-02 | 1994-05-03 | Pannell Bobby L | Air conditioning system for a recreational vehicle |
JP3104308B2 (en) | 1991-07-30 | 2000-10-30 | 松下電器産業株式会社 | Electric vehicle air conditioner |
JP3119281B2 (en) | 1991-10-14 | 2000-12-18 | 株式会社デンソー | Vehicle air conditioner |
US5170639A (en) | 1991-12-10 | 1992-12-15 | Chander Datta | Cascade refrigeration system |
JP3085335B2 (en) | 1991-12-27 | 2000-09-04 | 株式会社デンソー | Air conditioner |
US5333678A (en) | 1992-03-06 | 1994-08-02 | Onan Corporation | Auxiliary power unit |
FR2689215B1 (en) | 1992-03-30 | 1994-07-01 | Sari | AIR TREATMENT INSTALLATION. |
FR2690387B1 (en) | 1992-04-28 | 1995-06-23 | Valeo Thermique Habitacle | METHOD AND DEVICE FOR LOWERING THE AIR TEMPERATURE IN THE INTERIOR OF A VEHICLE WITHOUT TRAFFIC. |
US5271245A (en) | 1992-08-20 | 1993-12-21 | Ac&R Components, Inc. | Two-stage helical oil separator |
JP3084949B2 (en) | 1992-08-31 | 2000-09-04 | 松下電器産業株式会社 | Control drive of electric compressor for automobile |
US5275012A (en) | 1993-01-07 | 1994-01-04 | Ford Motor Company | Climate control system for electric vehicle |
US5586613A (en) | 1993-04-22 | 1996-12-24 | The Texas A&M University System | Electrically peaking hybrid system and method |
JP3312161B2 (en) | 1993-12-24 | 2002-08-05 | 株式会社豊田中央研究所 | Hydrogen fueled vehicles |
US5465589A (en) | 1993-09-07 | 1995-11-14 | Navistar International Transportation Corp. | Idle automated A/C system |
JP3380316B2 (en) | 1993-12-28 | 2003-02-24 | 本田技研工業株式会社 | Vehicle air conditioning equipment control device |
ES2199243T3 (en) | 1994-03-01 | 2004-02-16 | Auxiliary Power Dynamics, Llc | COMPACT AUXILIARY POWER SUPPLY SYSTEM FOR LARGE POWER DIESEL ENGINE. |
US5524442A (en) | 1994-06-27 | 1996-06-11 | Praxair Technology, Inc. | Cooling system employing a primary, high pressure closed refrigeration loop and a secondary refrigeration loop |
US6059016A (en) | 1994-08-11 | 2000-05-09 | Store Heat And Produce Energy, Inc. | Thermal energy storage and delivery system |
DE4440044C2 (en) | 1994-11-09 | 2001-12-20 | Carrier Suetrak Gmbh | Air conditioner |
FR2727902A1 (en) | 1994-12-09 | 1996-06-14 | Valeo Thermique Habitacle | DEVICE FOR AIR CONDITIONING A VEHICLE IN TRAFFIC AND PARKING |
US6112535A (en) | 1995-04-25 | 2000-09-05 | General Electric Company | Compressor including a motor and motor control in the compressor housing and method of manufacture |
US5761918A (en) | 1995-05-01 | 1998-06-09 | Index Sensors And Controls, Inc. | Integrated controller for commercial vehicle air conditioning system |
US6038879A (en) | 1995-08-08 | 2000-03-21 | Yvon Turcotte | Combined air exchange and air conditioning unit |
JPH0976740A (en) | 1995-09-08 | 1997-03-25 | Aqueous Res:Kk | Hybrid vehicle |
US5657638A (en) | 1995-10-02 | 1997-08-19 | General Electric Company | Two speed control circuit for a refrigerator fan |
US5901572A (en) | 1995-12-07 | 1999-05-11 | Rocky Research | Auxiliary heating and air conditioning system for a motor vehicle |
JPH09163791A (en) | 1995-12-07 | 1997-06-20 | Sanden Corp | Driving method for motor-driven compressor and drive device |
JP3707119B2 (en) | 1995-12-25 | 2005-10-19 | 株式会社デンソー | Air conditioner for vehicles |
US6209333B1 (en) | 1996-01-22 | 2001-04-03 | Rene F. Bascobert | Mobile air conditioning system and control mechanism |
JPH09318177A (en) | 1996-05-27 | 1997-12-12 | Matsushita Refrig Co Ltd | Multiroom type cooling/heating apparatus |
JPH1053019A (en) | 1996-06-03 | 1998-02-24 | Denso Corp | Air-conditioning device for vehicle |
US5901780A (en) | 1996-06-24 | 1999-05-11 | Rocky Research | Auxiliary active heating and air conditioning system for motor vehicle applications |
DE19628585C2 (en) | 1996-07-16 | 2001-12-20 | Danfoss As | Method for commutating a brushless motor and supply circuit for a brushless motor |
US5682757A (en) | 1996-08-01 | 1997-11-04 | Smart Power Systems, Inc. | Condensate liquid management system for air conditioner |
DK174114B1 (en) | 1996-10-09 | 2002-06-24 | Danfoss Compressors Gmbh | Method for speed control of a compressor as well as control using the method |
US5982643A (en) | 1996-10-10 | 1999-11-09 | Progressive Dynamics, Inc. | Power converter with selectively variable output and controller and display system therefor |
US5819549A (en) | 1996-10-16 | 1998-10-13 | Minnesota Mining And Manufacturing Company | Secondary loop refrigeration system |
JP3305974B2 (en) | 1997-03-05 | 2002-07-24 | トヨタ自動車株式会社 | Air conditioning controller for hybrid vehicles |
US5899081A (en) | 1997-03-31 | 1999-05-04 | White Consolidated Industries, Inc. | Heating and cooling unit using power inverter with battery |
US5898995A (en) | 1997-09-24 | 1999-05-04 | General Motors Corporation | Method of manufacture of a primary heat exchanger jacketed by a secondary heat exchanger |
US6073456A (en) | 1997-10-09 | 2000-06-13 | Denso Corporation | Air-conditioning device for hybrid vehicle |
US6111731A (en) | 1998-02-26 | 2000-08-29 | Technical Products Group, Inc. | Motor controller for preventing excessive battery discharging |
US5921092A (en) | 1998-03-16 | 1999-07-13 | Hussmann Corporation | Fluid defrost system and method for secondary refrigeration systems |
EP0958952A1 (en) | 1998-05-20 | 1999-11-24 | Carrier Corporation | Truck refrigeration unit incorporating horizontal rotary compressor |
US6457324B2 (en) | 1998-05-22 | 2002-10-01 | Bergstrom, Inc. | Modular low-pressure delivery vehicle air conditioning system having an in-cab cool box |
US6038877A (en) | 1998-05-22 | 2000-03-21 | Bergstrom, Inc. | Modular low pressure delivery vehicle air conditioning system |
AU4197999A (en) | 1998-05-22 | 1999-12-13 | Bergstrom, Inc. | Auxiliary heating and air conditioning system for a motor vehicle |
AT406363B (en) | 1998-06-10 | 2000-04-25 | Integral Verkehrstechnik Ag | VEHICLE, IN PARTICULAR RAIL VEHICLE |
US20020014329A1 (en) | 1998-06-29 | 2002-02-07 | Peter Carr | Integrated heating and cooling system for a vehicle |
JP2000110734A (en) | 1998-08-07 | 2000-04-18 | Toyota Autom Loom Works Ltd | Hybrid compressor and its control system |
JP2000108651A (en) | 1998-10-06 | 2000-04-18 | Denso Corp | Vehicle air conditioner |
DE19903769C2 (en) | 1999-01-30 | 2002-09-12 | Webasto Vehicle Sys Int Gmbh | Method for parking air conditioning in a motor vehicle |
JP4218123B2 (en) | 1999-04-15 | 2009-02-04 | 株式会社デンソー | Air conditioner |
US6467279B1 (en) | 1999-05-21 | 2002-10-22 | Thomas J. Backman | Liquid secondary cooling system |
US6205795B1 (en) | 1999-05-21 | 2001-03-27 | Thomas J. Backman | Series secondary cooling system |
US6253563B1 (en) | 1999-06-03 | 2001-07-03 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Solar-powered refrigeration system |
JP4067701B2 (en) | 1999-06-10 | 2008-03-26 | カルソニックカンセイ株式会社 | Air conditioner for vehicles |
US6282919B1 (en) | 1999-07-20 | 2001-09-04 | Rocky Research | Auxiliary active motor vehicle heating and air conditioning system |
US6205802B1 (en) | 2000-01-05 | 2001-03-27 | Carrier Corporation | Travel coach air conditioning system |
US6213867B1 (en) | 2000-01-12 | 2001-04-10 | Air Handling Engineering Ltd. | Venturi type air distribution system |
JP3480410B2 (en) | 2000-01-28 | 2003-12-22 | 株式会社デンソー | Vehicle air conditioner |
FR2806226B1 (en) | 2000-03-07 | 2002-05-31 | Valeo Climatisation | CONTROL DEVICE OF AN ELECTRIC COMPRESSOR FOR AIR CONDITIONING CIRCUIT |
JP2001289534A (en) | 2000-04-07 | 2001-10-19 | Toyota Autom Loom Works Ltd | Air-conditioning unit |
DE10019580B4 (en) | 2000-04-20 | 2010-06-10 | Behr Gmbh & Co. Kg | Device for cooling an interior of a motor vehicle |
US6405793B1 (en) | 2000-05-03 | 2002-06-18 | Delphi Technologies, Inc. | Secondary loop system for passenger compartment heating and cooling |
JP4426737B2 (en) | 2000-06-28 | 2010-03-03 | 東芝キヤリア株式会社 | Refrigeration equipment for vehicles |
US6453678B1 (en) | 2000-09-05 | 2002-09-24 | Kabin Komfort Inc | Direct current mini air conditioning system |
JP2002079828A (en) | 2000-09-07 | 2002-03-19 | Suzuki Motor Corp | Air-conditioner for electric vehicle |
US6745585B2 (en) | 2000-12-26 | 2004-06-08 | Visteon Global Technologies, Inc. | Electric air conditioner sustain system |
JP3736437B2 (en) | 2000-12-28 | 2006-01-18 | 株式会社デンソー | Air conditioner for hybrid vehicles |
JP2002243246A (en) | 2001-02-15 | 2002-08-28 | Sanden Corp | Air conditioner |
JP2003056461A (en) | 2001-02-15 | 2003-02-26 | Denso Corp | Complex driving system for compressor |
JP2002240547A (en) | 2001-02-16 | 2002-08-28 | Toyota Industries Corp | Air conditioner for vehicle, and method for operating the same |
JP3967116B2 (en) | 2001-04-24 | 2007-08-29 | 株式会社日本自動車部品総合研究所 | Compressor compound drive |
DE10218731A1 (en) | 2001-04-27 | 2002-12-12 | Denso Corp | Air conditioner with a drive-driven compressor for vehicles to stop without an engine |
US6637230B2 (en) | 2001-04-27 | 2003-10-28 | Denso Corporation | Automotive air-conditioner having sub-compressor driven by electric motor |
JP2003074476A (en) | 2001-08-31 | 2003-03-12 | Nippon Soken Inc | Compressor control device |
EP1300562A1 (en) | 2001-10-04 | 2003-04-09 | Visteon Global Technologies, Inc. | Control system for an internal combustion engine boosted with an electronically controlled compressor |
US6965818B2 (en) | 2001-11-28 | 2005-11-15 | Onan Corporation | Mobile energy management system |
JP2003214729A (en) | 2002-01-28 | 2003-07-30 | Toshiba Kyaria Kk | Air conditioner |
US6725134B2 (en) | 2002-03-28 | 2004-04-20 | General Electric Company | Control strategy for diesel engine auxiliary loads to reduce emissions during engine power level changes |
US6571566B1 (en) | 2002-04-02 | 2003-06-03 | Lennox Manufacturing Inc. | Method of determining refrigerant charge level in a space temperature conditioning system |
US9694651B2 (en) | 2002-04-29 | 2017-07-04 | Bergstrom, Inc. | Vehicle air conditioning and heating system providing engine on and off operation |
US6889762B2 (en) | 2002-04-29 | 2005-05-10 | Bergstrom, Inc. | Vehicle air conditioning and heating system providing engine on and engine off operation |
JP3917002B2 (en) | 2002-05-15 | 2007-05-23 | サンデン株式会社 | Air conditioner for vehicles |
US6865901B2 (en) | 2002-05-29 | 2005-03-15 | Webasto Thermosysteme International Gmbh | System with an internal combustion engine, a fuel cell and a climate control unit for heating and/or cooling the interior of a motor vehicle and process for the operation thereof |
KR100440157B1 (en) | 2002-06-25 | 2004-07-12 | 현대자동차주식회사 | Hybrid aircondition system controlling device and method thereof |
US6932148B1 (en) | 2002-10-07 | 2005-08-23 | Scs Frigette | Vehicle heating and cooling system |
CN100376416C (en) | 2003-02-28 | 2008-03-26 | 株式会社电装 | Compressor control system for vehicle air conditioner |
US7007493B2 (en) | 2003-07-21 | 2006-03-07 | Delphi Technologies, Inc. | Front-end integral air-conditioning unit |
JP4590833B2 (en) | 2003-07-24 | 2010-12-01 | トヨタ自動車株式会社 | Mobile body with cooling system |
US8016811B2 (en) | 2003-10-24 | 2011-09-13 | Altea Therapeutics Corporation | Method for transdermal delivery of permeant substances |
US7316119B2 (en) | 2004-03-25 | 2008-01-08 | Dometic Environmental Corporation | HVAC system for truck sleepers |
JP4391874B2 (en) | 2004-04-19 | 2009-12-24 | 本田技研工業株式会社 | Vehicle air conditioner |
US7350368B2 (en) | 2004-09-01 | 2008-04-01 | Behr Gmbh & Co. Kg | Stationary vehicle air conditioning system |
US7290400B2 (en) | 2004-09-01 | 2007-11-06 | Behr Gmbh & Co. Kg | Stationary vehicle air conditioning system and method |
US7150159B1 (en) | 2004-09-29 | 2006-12-19 | Scs Frigette | Hybrid auxiliary power unit for truck |
DE102005004950A1 (en) | 2005-02-03 | 2006-08-10 | Daimlerchrysler Ag | Air conditioning for a motor vehicle |
JP4511393B2 (en) | 2005-03-11 | 2010-07-28 | サンデン株式会社 | Air conditioner for vehicles |
JP4396938B2 (en) | 2005-03-25 | 2010-01-13 | 日産ディーゼル工業株式会社 | Air conditioner / refrigerator and automobile equipped with the same |
US7854135B2 (en) | 2005-05-03 | 2010-12-21 | Daniel Stanimirovic | Fully articulated and comprehensive air and fluid distribution, metering, and control method and apparatus for primary movers, heat exchangers, and terminal flow devices |
WO2007084666A1 (en) | 2006-01-18 | 2007-07-26 | Purdue Research Foundation | Apparatus and method for determining refrigerant charge level |
US7617695B2 (en) | 2006-03-29 | 2009-11-17 | Hussmann Corporation | Control method for variable capacity compressors |
US8947531B2 (en) | 2006-06-19 | 2015-02-03 | Oshkosh Corporation | Vehicle diagnostics based on information communicated between vehicles |
ES1063934Y (en) | 2006-07-13 | 2007-04-01 | Dirna S A | AIR CONDITIONING DEVICE FOR VEHICLES. |
ES2742529T3 (en) | 2006-09-21 | 2020-02-14 | Mitsubishi Electric Corp | Air cooling / conditioning system with refrigerant leak detection function, air conditioner / refrigerator and method for detecting refrigerant leaks |
US20080110185A1 (en) | 2006-09-29 | 2008-05-15 | Behr America Inc. | Vehicle HVAC system |
US8863540B2 (en) | 2006-11-15 | 2014-10-21 | Crosspoint Solutions, Llc | HVAC system controlled by a battery management system |
US8517087B2 (en) | 2007-02-20 | 2013-08-27 | Bergstrom, Inc. | Combined heating and air conditioning system for vehicles |
US8141377B2 (en) | 2007-02-21 | 2012-03-27 | Bergstrom, Inc. | Truck electrified engine-off air conditioning system |
US9758014B2 (en) | 2009-02-27 | 2017-09-12 | Thermo King Corporation | Low profile air conditioning unit for vehicles |
US8156754B2 (en) | 2009-03-13 | 2012-04-17 | Denso International America, Inc. | Carbon dioxide refrigerant-coolant heat exchanger |
CN102803865A (en) | 2010-03-08 | 2012-11-28 | 开利公司 | Capacity and pressure control in a transport refrigeration system |
US8943848B2 (en) | 2010-06-16 | 2015-02-03 | Reznor Llc | Integrated ventilation unit |
US9696059B2 (en) | 2010-07-07 | 2017-07-04 | Hussmann Corporation | Integrated heating, ventilation, air conditioning, and refrigeration system |
JP5768338B2 (en) | 2010-07-08 | 2015-08-26 | 株式会社デンソー | Fuel supply system |
FR2966391B1 (en) | 2010-10-22 | 2013-05-31 | Eberspaecher J | AIR CONDITIONING DEVICE, IN PARTICULAR FOR A SANITARY VEHICLE. |
US8533975B2 (en) | 2010-10-29 | 2013-09-17 | General Electric Company | Apparatus and method for refrigeration cycle elevation by modification of cycle start condition |
US20120118532A1 (en) | 2010-11-17 | 2012-05-17 | Lennox International, Inc. | Flexible Attachment System for a Coil Heat Exchanger |
DE102010054965A1 (en) | 2010-12-17 | 2012-06-21 | Volkswagen Ag | Ventilation device for feeding fresh air into vehicle cabin, has exchanger connected with air ducts, supply line and vent pipe, and circulation element arranged in fresh air supply and/or in region of connection of air supply with spacer |
JP5625993B2 (en) | 2011-02-22 | 2014-11-19 | 株式会社デンソー | Air conditioner for vehicles |
CA2736085C (en) | 2011-03-28 | 2013-05-14 | Fakieh Research & Development Center | Combined air conditioning and water generating system |
JP5952383B2 (en) | 2011-04-06 | 2016-07-13 | スリーエム イノベイティブ プロパティズ カンパニー | Fluoropolyether elastomer composition having low glass transition temperature |
US9348492B1 (en) | 2011-04-22 | 2016-05-24 | Angel A. Penilla | Methods and systems for providing access to specific vehicle controls, functions, environment and applications to guests/passengers via personal mobile devices |
JP5967403B2 (en) | 2011-12-05 | 2016-08-10 | パナソニックIpマネジメント株式会社 | Air conditioner for vehicles |
US8919140B2 (en) | 2012-01-23 | 2014-12-30 | Caterpillar Inc. | Method and apparatus providing auxiliary cabin cooling |
US9216628B2 (en) | 2012-04-24 | 2015-12-22 | Zero Rpm, Inc. | Apparatus and methods for vehicle idle management |
JP6091506B2 (en) | 2012-07-23 | 2017-03-08 | 三菱電機株式会社 | Refrigeration air conditioner, refrigerant leak detection device, and refrigerant leak detection method |
DE102012108886B4 (en) | 2012-09-20 | 2019-02-14 | Hanon Systems | Heat exchanger arrangement and air conditioning system of a motor vehicle |
CN104955702B (en) | 2013-01-17 | 2017-04-12 | 三菱电机株式会社 | Vehicle air conditioning control device |
US9051934B2 (en) | 2013-02-28 | 2015-06-09 | Bitzer Kuehlmaschinenbau Gmbh | Apparatus and method for oil equalization in multiple-compressor systems |
JP6125325B2 (en) | 2013-05-20 | 2017-05-10 | サンデンホールディングス株式会社 | Air conditioner for vehicles |
US9120365B2 (en) | 2013-12-09 | 2015-09-01 | Ford Global Technologies, Llc | Automatic temperature override pattern recognition system |
US9878631B2 (en) | 2014-02-25 | 2018-01-30 | Elwha Llc | System and method for predictive control of an energy storage system for a vehicle |
-
2015
- 2015-12-10 US US14/965,142 patent/US10006684B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3948060A (en) * | 1972-05-24 | 1976-04-06 | Andre Jean Gaspard | Air conditioning system particularly for producing refrigerated air |
US6543245B1 (en) * | 2001-11-08 | 2003-04-08 | Thermo King Corporation | Multi-temperature cold plate refrigeration system |
US20050257545A1 (en) * | 2004-05-24 | 2005-11-24 | Ziehr Lawrence P | Dual compressor HVAC system |
US7765824B2 (en) * | 2006-02-01 | 2010-08-03 | Paccar Inc | Vehicle interior cooling system |
US8001799B2 (en) * | 2006-07-12 | 2011-08-23 | Denso Corporation | Multiple cooling sources for a vehicle air conditioning system |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10845064B2 (en) * | 2017-02-15 | 2020-11-24 | Johnson Controls Technology Company | Heating, ventilation, and air conditioning control system |
US11906192B2 (en) | 2017-02-15 | 2024-02-20 | Johnson Controls Tyco IP Holdings LLP | Heating, ventilation, and air conditioning control system |
US10807437B2 (en) | 2017-09-26 | 2020-10-20 | Emerson Climate Technologies, Inc. | Evaporator freeze prevention systems and methods |
WO2019067589A1 (en) * | 2017-09-26 | 2019-04-04 | Emerson Climate Technologies, Inc. | Temperature control systems and methods for vehicles |
CN111148643A (en) * | 2017-09-26 | 2020-05-12 | 艾默生环境优化技术有限公司 | Temperature control system and method for vehicle |
US10668783B2 (en) | 2017-09-26 | 2020-06-02 | Emerson Climate Technologies, Inc. | Vehicle air conditioning control systems |
US20190092117A1 (en) * | 2017-09-26 | 2019-03-28 | Emerson Climate Technologies, Inc. | Evaporator Freeze Prevention Systems and Methods |
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US10870326B2 (en) | 2017-09-26 | 2020-12-22 | Emerson Climate Technologies, Inc. | Battery power management systems and methods for engine off |
US10870327B2 (en) | 2017-09-26 | 2020-12-22 | Emerson Climate Technologies, Inc. | Drive cooling systems and methods for engine off |
US20190092132A1 (en) * | 2017-09-26 | 2019-03-28 | Emerson Climate Technologies, Inc. | Compressor Discharge Pressure Based Control Systems And Methods |
US10967699B2 (en) * | 2018-06-11 | 2021-04-06 | Paccar Inc | Systems and methods for reducing slugging in HVAC compressor of vehicle |
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